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