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