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