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