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