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