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