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