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