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