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