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