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