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)(14,26)(16,25)(17,24)(19,32)(20,28)(22,27)(23,31)(29,30) involution — undirected(1,3)(2,8)(4,19,21,31)(5,16)(6,15)(7,17)(9,26,18,29)(10,13)(11,24)(12,25)(14,22,30,20)(23,28,32,27)(1,4,5,20,7,21,6,22)(2,9,11,28,12,18,10,27)(3,14,15,19,17,30,16,31)(8,23,13,29,25,32,24,26)(2,10,12,11)(8,13,25,24)(9,27,18,28)(23,29,32,26)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.