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