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