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