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