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