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)(17,18,22,24)(19,29,20,26)(21,28,23,27)(25,31,32,30)(1,3)(2,6)(4,7)(5,8)(10,11)(12,13)(18,24)(19,20)(27,28)(30,31) involution — undirected(9,11,14,10)(12,15,13,16)(17,19,22,20)(18,25,24,32)(21,30,23,31)(26,27,29,28)(3,8)(6,7)(9,12,14,13)(10,15,11,16)(17,20,22,19)(18,26,24,29)(21,30,23,31)(25,27,32,28)(1,4,5,2)(3,7,8,6)(9,13,14,12)(10,15,11,16)(17,21,22,23)(18,27,24,28)(19,30,20,31)(25,29,32,26)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.