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