One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(13,14)(15,24)(16,28)(17,22)(18,23)(19,34)(20,27)(21,32)(25,40)(26,37)(29,43)(30,39)(31,42)(33,36)(35,44)(38,41)(2,4)(5,6,8,9)(7,10,11,12)(13,15,18,27)(14,20,23,24)(16,29,31,25)(17,33,19,26)(21,38,39,35)(22,37,34,36)(28,40,42,43)(30,41,32,44)(6,9)(7,11)(13,16,17,30,18,31,19,32)(14,21,34,42,23,39,22,28)(15,25,33,44,27,29,26,41)(20,35,36,40,24,38,37,43)(5,7)(6,10)(8,11)(9,12)(13,17,18,19)(14,22,23,34)(15,26,27,33)(16,30,31,32)(20,36,24,37)(21,28,39,42)(25,41,29,44)(35,40,38,43)(6,9)(7,11)(15,27)(20,24)(25,29)(26,33)(35,38)(36,37)(40,43)(41,44) involution — undirectedA 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.