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