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