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