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