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