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