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