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