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