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