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