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