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