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