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