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