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