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