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