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