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