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