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