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