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)(17,18,23,28,22,25,21,27)(19,29,30,31,26,24,32,20)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19,22,26)(18,24,25,29)(20,27,31,28)(21,32,23,30)(10,14)(13,16)(18,25)(19,26)(27,28)(30,32) involution — undirected(17,20,23,29,22,31,21,24)(18,26,28,32,25,19,27,30)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,27,25,28)(19,30,26,32)(20,29,31,24)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.