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