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