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