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)(11,15)(12,13)(14,16)(18,22)(19,27)(20,24)(23,26)(25,32)(28,31) involution — undirected(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(18,23)(19,27)(20,24)(22,26)(28,31)(29,30) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,18,24,23,21,26,20,22)(19,25,31,30,28,32,27,29)(9,11,12,16)(10,14,13,15)(17,19,24,31,21,28,20,27)(18,25,23,30,26,32,22,29)(2,5)(6,8)(18,26)(22,23)(25,32)(29,30) 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.