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