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