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