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