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