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