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