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