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