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