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