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