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