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