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