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