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