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