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