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