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