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