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)(19,26)(20,25)(21,27)(22,28)(23,29)(24,30)(31,32) involution — undirected(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,31,24,27,22,20)(18,25,28,21,30,32,29,26)(1,3,4,7)(2,6,5,8)(10,13)(11,15)(17,20,22,27,24,31,23,19)(18,26,29,32,30,21,28,25)(9,11,12,15)(10,14,13,16)(17,21,24,26)(18,27,30,19)(20,29,31,28)(22,25,23,32)(10,13)(14,16)(17,22,24,23)(18,28,30,29)(19,20,27,31)(21,32,26,25)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.