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