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