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