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