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