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