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