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