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