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