One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,8)(6,9)(7,10)(11,12)(13,14)(15,16)(17,18)(19,23)(20,25)(21,31)(22,27)(24,30)(26,28)(29,32)(34,39)(35,40)(37,45)(44,48) involution — undirected(1,3)(2,4)(5,11)(6,7)(8,12)(9,10)(13,16)(14,15)(17,19,22,29)(18,23,27,32)(20,28,30,21)(24,31,25,26)(33,34)(35,42)(36,40)(37,41)(38,39)(43,48)(44,47)(45,46)(1,2)(3,10)(4,7)(5,8)(6,9)(11,16)(12,15)(13,14)(17,20)(18,24)(19,28)(21,29)(22,30)(23,31)(25,27)(26,32)(33,35,38,40)(34,36,39,42)(37,43,45,47)(41,44,46,48)(1,2)(3,4)(5,13)(6,9)(7,10)(8,14)(11,16)(12,15)(17,20)(18,25)(19,28)(21,29)(22,30)(23,26)(24,27)(31,32)(33,34)(35,36)(37,41)(38,39)(40,42)(43,44)(45,46)(47,48) involution — undirected(1,4)(2,7)(3,9)(5,12)(6,10)(8,15)(11,13)(14,16)(17,18)(19,23)(20,24)(21,26)(22,27)(25,30)(28,31)(29,32)(33,36)(34,40)(35,39)(37,44)(38,42)(41,47)(43,46)(45,48) involution — undirected(1,5)(2,8)(3,11)(4,12)(6,14)(7,15)(9,13)(10,16)(17,21,22,28)(18,26,27,31)(19,20,29,30)(23,24,32,25)(33,37,38,45)(34,41,39,46)(35,43,40,47)(36,44,42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.