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