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