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