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