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