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