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