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