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