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