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