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