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)(11,13)(12,14)(15,16)(17,18,23,21)(19,24,31,28)(20,25,33,35)(22,26,38,36)(27,39,46,47)(29,40,30,41)(32,42,45,48)(34,43,37,44)(1,3)(2,5)(4,8)(6,7)(9,11,12,15)(10,13,14,16)(17,19)(18,24)(20,32)(21,28)(22,29)(23,31)(25,42)(26,40)(27,34)(30,38)(33,45)(35,48)(36,41)(37,46)(39,43)(44,47)(10,14)(13,16)(17,20,23,33)(18,25,21,35)(19,27,31,46)(22,37,38,34)(24,39,28,47)(26,44,36,43)(29,32,30,45)(40,42,41,48)(2,6)(5,7)(17,21,23,18)(19,28,31,24)(20,25,33,35)(22,36,38,26)(27,39,46,47)(29,41,30,40)(32,42,45,48)(34,43,37,44)(3,8)(5,7)(19,29)(20,33)(22,38)(24,40)(25,35)(26,36)(27,45)(28,41)(30,31)(32,46)(39,48)(42,47) 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.