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