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