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