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