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