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