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