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