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