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