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