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