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