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