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