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