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