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