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