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