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