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