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