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