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)(11,15)(12,13)(14,16)(17,18,23,28)(19,24,30,25)(20,31,34,40)(21,35,36,48)(22,38,32,27)(26,42,44,37)(29,43,45,46)(33,39,47,41)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,30)(18,24,28,25)(20,22,34,32)(21,33,36,47)(26,43,44,46)(27,31,38,40)(29,42,45,37)(35,39,48,41)(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,20,32,19,23,34,22,30)(18,25,38,40,28,24,27,31)(21,33,42,29,36,47,37,45)(26,41,48,43,44,39,35,46)(9,11,12,16)(10,14,13,15)(17,21,32,42,23,36,22,37)(18,26,38,48,28,44,27,35)(19,29,34,47,30,45,20,33)(24,39,31,46,25,41,40,43)(2,5)(6,8)(21,36)(26,44)(29,45)(33,47)(35,48)(37,42)(39,41)(43,46) 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.