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