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