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