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