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