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