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