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