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