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