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