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