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