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