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