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