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