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