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