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)(17,18,23,37,22,28,21,27)(19,24,31,40,33,42,32,41)(20,26,34,25,36,43,35,44)(29,45,47,38,30,39,46,48)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,33)(18,24,28,42)(20,29,36,30)(21,32,23,31)(25,38,44,48)(26,45,43,39)(27,41,37,40)(34,47,35,46)(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,20)(18,25)(19,29)(21,34)(22,36)(23,35)(24,38)(26,37)(27,43)(28,44)(30,33)(31,46)(32,47)(39,41)(40,45)(42,48)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,20)(18,26)(19,30)(21,35)(22,36)(23,34)(24,39)(25,37)(27,44)(28,43)(29,33)(31,46)(32,47)(38,41)(40,48)(42,45)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,21,22,23)(18,27,28,37)(19,31,33,32)(20,34,36,35)(24,40,42,41)(25,43,44,26)(29,46,30,47)(38,45,48,39)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.