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