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