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