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