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