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