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