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