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