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