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