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