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