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