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)(11,13,15,16)(17,18,23,20)(19,24,22,26)(21,28,30,25)(27,32,29,31)(9,10)(11,13)(12,14)(15,16)(17,19)(18,24)(20,26)(21,27)(22,23)(25,31)(28,32)(29,30) involution — undirected(2,6)(3,7)(9,11,12,15)(10,13,14,16)(18,20)(19,22)(25,28)(27,29)(1,3,5,7)(2,4,6,8)(17,20,23,18)(19,26,22,24)(21,25,30,28)(27,31,29,32)(1,4)(2,7)(3,6)(5,8)(17,21,23,30)(18,25,20,28)(19,27,22,29)(24,31,26,32)(17,22,23,19)(18,26,20,24)(21,29,30,27)(25,32,28,31)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.