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)(20,30)(21,26)(22,36)(23,27)(25,32)(28,40)(29,37)(31,44)(33,39)(34,41)(35,42)(38,45)(43,47)(46,48)(1,3)(2,6)(4,7)(5,8)(10,13)(11,15)(17,19,23,22)(18,24,27,36)(20,28,33,32)(21,29,35,34)(25,30,40,39)(26,37,42,41)(31,43,46,45)(38,44,47,48)(1,2,5,4)(3,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,20,22,32,23,33,19,28)(18,25,24,30,27,40,36,39)(21,31,34,45,35,46,29,43)(26,38,37,44,42,47,41,48)(1,4,5,2)(3,6,8,7)(10,13)(14,16)(17,21)(18,26)(19,29)(20,31)(22,34)(23,35)(24,37)(25,38)(27,42)(28,43)(30,44)(32,45)(33,46)(36,41)(39,48)(40,47)(9,11,12,15)(10,14,13,16)(17,19,23,22)(18,24,27,36)(20,32,33,28)(21,34,35,29)(25,39,40,30)(26,41,42,37)(31,43,46,45)(38,44,47,48)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.