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