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