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