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