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