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)(17,18,22,27,23,28,21,26)(19,24,32,40,30,38,31,39)(20,25,34,42,35,43,36,44)(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)(25,41,43,48)(26,39)(27,40)(28,38)(29,34,45,36)(37,42,47,44)(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)(26,44)(27,42)(28,43)(30,45)(31,46)(32,33)(38,47)(39,48)(40,41)(1,4,5,3)(2,7,6,8)(10,13)(14,15)(19,30)(24,38)(29,45)(31,32)(33,46)(37,47)(39,40)(41,48)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.