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