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