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)(11,14)(12,13)(15,16)(17,18,21,19,22,25,24,27)(20,28,30,32,29,23,31,26)(2,6)(7,8)(17,19)(18,21)(20,28)(22,27)(23,29)(24,25)(26,30)(31,32) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,21,30,22,29,24,31)(18,23,19,26,25,28,27,32)(1,4,5,3)(2,8,6,7)(17,18,24,27,22,25,21,19)(20,23,31,32,29,28,30,26)(9,11,12,15)(10,14,13,16)(20,29)(23,28)(26,32)(30,31)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.