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