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