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