One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,9)(7,10)(11,14)(12,13)(15,16)(17,18)(19,21)(20,24)(22,25)(23,27)(26,29)(28,32)(30,31)(33,34,37,40)(35,41,42,38)(36,39,46,45)(43,48,44,47)(1,3)(2,6)(4,11)(5,10)(7,9)(8,14)(12,15)(13,16)(17,19)(18,23)(20,26)(21,25)(22,27)(24,31)(28,30)(29,32)(35,42)(38,41)(43,44)(47,48) involution — undirected(3,10)(6,7)(11,16)(14,15)(20,28)(24,32)(26,30)(29,31)(33,35,37,42)(34,38,40,41)(36,43,46,44)(39,47,45,48)(1,3)(2,7)(4,11)(5,10)(6,9)(8,15)(12,14)(13,16)(17,20)(18,24)(19,26)(21,29)(22,28)(23,31)(25,32)(27,30)(33,35)(34,38)(36,44)(37,42)(39,48)(40,41)(43,46)(45,47) involution — undirected(1,4)(2,8)(3,11)(5,13)(6,14)(7,15)(9,12)(10,16)(17,21,22,23)(18,19,25,27)(20,29,28,31)(24,26,32,30)(33,34)(35,38)(36,45)(37,40)(39,46)(41,42)(43,48)(44,47)(1,2)(3,6)(4,12)(5,9)(7,10)(8,13)(11,15)(14,16)(17,19)(18,21)(20,30)(22,27)(23,25)(24,31)(26,28)(29,32)(33,36,37,46)(34,39,40,45)(35,43,42,44)(38,47,41,48)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.