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