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