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