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