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