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