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