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)(11,13)(12,14)(15,16)(17,18,21,24)(19,23,26,32)(20,28,30,25)(22,29,31,27)(9,11)(10,13)(12,15)(14,16)(17,19,21,26)(18,22,24,31)(20,29,30,27)(23,25,32,28)(1,3,4,8)(2,5,6,7)(11,15)(13,16)(17,19)(18,23)(20,27)(21,26)(22,28)(24,32)(25,31)(29,30)(11,15)(13,16)(19,26)(22,31)(23,32)(27,29) involution — undirected(10,14)(13,16)(18,24)(22,31)(23,32)(25,28) 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.