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