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