One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,15)(8,10)(9,12)(11,14)(13,20)(16,17)(18,19)(21,22,26,30)(23,31,32,27)(24,28,25,29)(33,36,34,35)(1,2,3,4)(5,7,11,9)(6,12,14,15)(8,18,13,16)(10,17,20,19)(23,32)(27,31)(33,34)(35,36)(7,9)(12,15)(16,18)(17,19)(21,23)(22,27)(24,33)(25,34)(26,32)(28,35)(29,36)(30,31) involution — undirected(5,8,11,13)(6,10,14,20)(7,16,9,18)(12,19,15,17)(21,22)(23,27)(24,28)(25,29)(26,30)(31,32)(33,35)(34,36)(5,9,11,7)(6,12,14,15)(8,18,13,16)(10,19,20,17)(21,24,26,25)(22,28,30,29)(23,33,32,34)(27,35,31,36)(5,10)(6,13)(7,17)(8,14)(9,19)(11,20)(12,16)(15,18)(21,25,26,24)(22,29,30,28)(23,34,32,33)(27,36,31,35)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.