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