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