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