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