One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,16)(12,14)(13,15)(17,18,22,23)(19,24,27,31)(20,28,29,25)(21,26,30,32)(1,3)(2,5)(4,8)(6,7)(17,19)(18,24)(20,26)(21,25)(22,27)(23,31)(28,30)(29,32) involution — undirected(9,11,13,12)(10,14,15,16)(17,20,22,29)(18,25,23,28)(19,21,27,30)(24,32,31,26)(2,6)(5,7)(17,18,22,23)(19,24,27,31)(20,28,29,25)(21,26,30,32)(3,8)(5,7)(9,12,13,11)(10,14,15,16)(17,21,22,30)(18,26,23,32)(19,20,27,29)(24,28,31,25)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.