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