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