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