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