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