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