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