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