One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8,7,12,5,11)(3,9,15,16,4,14,13,10)(17,18,23,27,22,28,21,26)(19,29,32,24,33,44,31,39)(20,25,37,42,36,43,35,41)(30,40,46,38,47,45,34,48)(2,8)(3,13)(4,15)(5,6)(10,16)(11,12)(17,19)(18,24)(20,34)(21,32)(22,33)(23,31)(25,40)(26,44)(27,29)(28,39)(30,35)(36,46)(37,47)(38,41)(42,48)(43,45) involution — undirected(1,3,7,4)(2,9,12,14)(5,13,6,15)(8,16,11,10)(17,19)(18,24)(20,30)(21,31)(22,33)(23,32)(25,38)(26,29)(27,44)(28,39)(34,35)(36,47)(37,46)(40,41)(42,45)(43,48)(1,4,7,3)(2,10,12,16)(5,13,6,15)(8,14,11,9)(17,20,22,36)(18,25,28,43)(19,30,33,47)(21,37,23,35)(24,38,39,48)(26,42,27,41)(29,45,44,40)(31,46,32,34)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.