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