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