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