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