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