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