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