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