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