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