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