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