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