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