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