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