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)(17,18,23,28)(19,24,29,25)(20,26,30,32)(21,27,22,31)(1,3,5,8)(2,6,4,7)(9,11,13,10)(12,14,16,15)(17,19,23,29)(18,24,28,25)(20,21,30,22)(26,27,32,31)(10,11)(12,16)(17,20)(18,25)(19,22)(21,29)(23,30)(24,28)(26,31)(27,32) involution — undirected(1,4,5,2)(3,6,8,7)(9,12,13,16)(10,14,11,15)(17,20)(18,26)(19,21)(22,29)(23,30)(24,27)(25,31)(28,32)(10,11)(14,15)(17,21,23,22)(18,27,28,31)(19,20,29,30)(24,26,25,32)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.