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