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