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