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