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