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