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