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