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