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