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