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