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