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