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