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