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