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