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