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