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