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