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