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