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