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