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