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