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