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