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