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