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