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