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